<template>
 <div>
    <button @click="isShow = !isShow">显示/隐藏</button>
    <!-- <transition> -->
    <!-- <transition name="hello" :appear="true"> -->
    <transition name="hello" appear>
      <h1 v-show="isShow">你好啊！</h1>
    </transition>
 </div>
</template>

<script>
export default {
  name: 'Test',
  data() {
   return {
     isShow: true
   }
  }
}
</script>

<style scoped>
h1 {
  background-color: skyblue;
  transition: 1s linear;
}
/* 进入的起点 */
.hello-enter {
  transform: translateX(-100%);
}
/* 进入的终点 */
.hello-enter-to {
  transform: translateX(0);
}
/* 离开的起点 */
.hello-leave {
  transform: translateX(0);
}
/* 离开的终点 */
.hello-leave-to {
  transform: translateX(-100%);
}
</style>